not pc question,but a tech question nonetheless

i have analogue ntl cable tv and an ordinary wide-screen tv.i have seen the free view digi boxes in the shops for around £50.do i need to have a digital tv,or in my case digital ntl box,to make the free view work,or is it just plug and play?

Can you borrow a box to try it out? My daughter should not be able to get it whilst my son should have wonderful but his reception is not as good as hers. Also we found that different boxes on same site gave different results.So make sure you can exchange/money back if you buy a freeview box that's unsatisfactory.We found the Dabs Humax boxes worked best [tried Phillips and Goodmans too]. The more expensive Humax was well worth the extra.There are several recant exhaustive threads in Consumerwatch.